Island Lake man charged with threatening juvenile

A three-month-long investigation culminated in the arrest of a 43-year-old Island Lake man for exchanging explicit material with and threatening a juvenile, McHenry County Sheriff Keith Nygren announced Thursday.

The sheriff's office said Douglas J. Carlson, of the 4000 block of Beech Street, is charged with two felonies -- one for dealing in harmful material and another for intimidation.

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The investigation began in August, when deputies began investigating an incident in which a juvenile had been contacted on a social networking site. Deputies said Carlson had contacted the juvenile on several occasions and sent explicit photographs over the Internet. Carlson, deputies said, was also able to obtain explicit photographs from the juvenile and threatened to show them to the victim's friends if the juvenile didn't continue to send photographs, deputies said.

Sheriff's detectives obtained an arrest warrant on Nov. 14 for Carlson, and he was taken into custody in Island Lake, authorities said.

The investigation is continuing and further charges are pending, according to the sheriff's office. Carlson is scheduled to appear in court at 9 a.m. Nov. 28. Bond is set at $30,000.

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